Phylum Proteobacteria, Class Betaproteobacteria, Order Burkholderiales, Family Alcaligenaceae, Genus Alcaligenes, Alcaligenes
aquatilis Van Trappen et al. 2005.
Gram-negative short rods, 0.7-1.1 x 1.0-2.5 μm. Non-spore-forming. Motile by
Colonies on trypticase soy agar, after 2 days incubation at 28 ºC, are non-pigmented
or yellow-pigmented, circular, low-convex and smooth, with spreading, irregular
edges and a diameter of 2.0-5.0 mm. Growth temperature is 4-35 ºC (optimum 18-24
ºC). Nitrate and nitrite are not reduced under anaerobic conditions, but slight growth
is observed under these conditions after 5 days.
Isolated from sediments of the Weser Estuary, Germany, and of Shem Creek, Charleston Harbor, USA.
- Van Trappen (S.), Tan (T.L.), Samyn (E.) and Vandamme (P.): Alcaligenes aquatilis sp. nov., a novel bacterium from sediments of
the Weser Estuary, Germany, and a salt marsh on Shem Creek in Charleston Harbor, USA. Int. J. Syst. Evol. Microbiol., 2005, 55,
Positive results for arginine dihydrolase, catalase (most strains), nitrite reduction (not nitrates) & oxidase.
Can utilize: sodium acetate, sodium citrate (most strains), malonate (most strains), caprate (most strains), malate, phenylacetate,
valerate, histidine, suberate, DL-lactate, glycogen, 3-hydroxybenzoate & L-serine.
Negative results for esculin hydrolysis, gelatin hydrolysis, beta-galactosidase, H2S production, indole production, lysine
decarboxylase, nitrate reduction, ornithine decarboxylase, starch hydrolysis & urease.
No utilization of: glucose, L-arabinose, mannose, mannitol, N-acetylglucosamine, maltose, gluconate, adipate, salicin, D-melibiose,
L-fucose, D-sorbitol, propionate, 2- and 5-ketogluconate, 3-hydroxybutyrate, 4-hydroxybenzoate, L-proline, rhamnose, D-ribose,
inositol, D-sucrose, itaconate, L-alanine, L-tryptophan.
(c) Costin Stoica